Blank-slotting machine.



G. A. FISHER & J. A. MORRISON. BLANK SLOTTING MACHINE.

APPLICATION FILED JULY 3,1911.

1,012,538. Patented Dec. 19,1911.

6 BKEETB-SEEET 1.

G. A. FISHER & J. A. MORRISON. BLANK SLOTTING MACHINE. APPLIOATIOfi TILED JULY 3,1911.

Patented Dec. 19, 1911.

G. A. FISHER & J. A. MORRISON.

BLANK SLOTTING 111101111111.

APPLICATION FILED JULY 3,1911.

G. A. FISHER & J. A. MORRISON;

BLANK SLOTTING MACHINE.

urucuxon nun JULY 3, 1911.

1,012,538 Patented Dec. 19, 1911.

5 BHEBTS'SHEET 4. E9. 4 27 I fvuervfor Gearye 1723567: 4/ 4 {iiv flJ/orrrlsazz.

G. A. FISHER &-J. A. MORRISON.

BLANK SLOTTING MACHINE.

APPLICATION mum-JULY 3,1911.

1,012,538. Patented Dec. 19, 1911.

5 SHEETS-BHEBT 5. 5' 96 -95 l2. -.5' [7200250749.- Minessa's- Gear aflF' 6 v 4 61 y :8 er: $7 6 4' J'o/rrzfl J/orralson,

UNITED STATES PATENT OFFICE.

GEORGE A. FISHER AND JOHN A. MORRISON, OF MINNEAPOLIS, MINNESOTA. ASSIGN- ORS TO FISHER PAIER BOX COMPANY, OF MINNEAPOLIS, MINNESOTA, A CORPORA- TION.

BLANK-SLOT'IING MACHINE.

Specification of Letters Patent.

Patented Dec 19, 1911.

Application filed m a, 1911. Serial No. 636,804.

To all whom it may concern: 1

Be it known that we, GEORGE A. FISHER and JOHN A. Monmsoiv, citizens of the United States, residing at Minneapolis, in the county of Hennepin and State of Minnesota, have invented certain new and useful Improvements in Blank-slotting Machines, of which the following is a specification.

Our invention relates to a machine for slot-ting blanks of paste board used in the.

making of egg cases and for other analogous purposes, and has for its object to provide such "a machine in which the blanks will be fed and delivered entirely automatically, the slots cut simultaneously by members operating with a progressive shearing action together with means for adjusting the machine to cut slots of different lengths and differently spaced apart, as desired.

The full objects and advantages of our invention will appear in connection with the detailed description thereof and are particularly pointed out in the claims.

In thedrawings illustrating the application of our invention in one form,Figure 1 is a plan'view of a machine embodying our invention. Fig. 2 is a side elevation. Fig. 3 is a sectional elevation corresponding to Fig. 1. Fig. 4 is an end elevation partly in section. through the feeding table just back of the adjustable gate. Figs. 6 to. 12, inclusive, are detail views of the double disks for holding the slot-cutting members.

A main supporting frame is composed of legs 13 and longitudinal frame members 14 secured in fixed parallel relation by means of cross rods 15. Upon the frame members 14 at either side of the machine are bolted heavy upright castings 16 and 17 provided with bearings for shafts 18 and 19 mounted in a common vertical plane, the bear ngs for shaft 18 being ordinary closed bearings, as

shown at 20 in Fig. 4, while the bearings 21 for shaft 19 and for a sleeve 22 fast on said shaft 19 are closed at the top by a cap 23 pressed down by a spiral spring 24 positioned between cap 23 and a block 25, against which abuts the end of. a screw bolt 26 threaded into the tops of castings 16 and 17 by which the force exerted by the spring upon bearing blocks 23 may be regulated. If desired, the castings 16 and 17 may be united at the lower ends thereof by a cross Fig. 5 is a sectional view taken bar 27 which may, as shown, be cast directly with the members 16 and 17. The lower shaft 18 extends outside of the castings 17, having thereon a loose pulley 28 connected with a source of power by common means and a clutch 29 splined to the shaft and operated by means of a lever 30 to cause the shaft 18 to rotate with pulley 28 or not, asdesired. Between the castings 16 and 17 shaft 18 has fast thereon a long sleeve 31, and outside of casting 16 a spur gear 32 is fast on shaft 18 meshing with a spur gear- 33 which is loose on shaft 19 and is adjustably secured to rotate with shaft 19 by means of bolts 34 extending into gear 33 and through slots 35 in a disk 36 fast on shaft 19. The shaft 18 also has on the end-thereof outside of gear 32 a hand wheel 37. By loosening bolts 34 and turning hand wheel 37 the position of gear 33 relative to sleeve 22 may be varied for the purpose of increasing or decreasing the length of cutting action of the slotting members hereafter to be described, the pointer 38 on gear 33 indicating upon the scale 39 or disk 36 the exact length of slot to be cut for any given relative position of gear 33 and sleeve 22.

Sleeves 31 and 22 are of the same diameter and have uninterrupted peripheral surfaces excepting for a guide l1ne 40 running longitudinally on the surface of each of said sleeves. The slotting elements are mounted upon these sleeves, those on sleeve 22 comprising protruding knives and those on sleeve 31 the die seats or members between which the knives operate cooperating with the edges thereof to produce the slots. Each of these slotting elements comprises a pair of disk-like rings of the same outer peripheral diameter, one of said rings 41 having a sleeve-like flange 42 with an lnner diameter substantially that of the sleeves 31 and 22 and being cut across or transversely split, as shown at 43. The other of said ring disks 44 is completely closed and has an inner peripheral diameter adapted to register over the sleeve 42. In the member 4 are a pair of set screws 45 and 46.extending through the same and adapted to impinge upon flange 42 when ring 44 is assembled thereon. All of rings 41 and on both sleeves are provided with a pair of holes 47 and 48, the holes in the ring 41 being spaced apart and symmetrically disposed at 'apoint opposite the cleft 43 while the holes 47 and 48. in ring 44 are positioned opposite the set bolts 45 and 46 so that when the parts are assembled the set bolts 45 and 5 46 will bear upon flange 42 close to and on either side of cleft 43, as clearly shown in Fig. 3. By screwing up upon the set bolts 45 andv 46 the flange 42 may be made to clamp the sleeve 22 or the sleeve 31 with its entire inner peripheral surface with the result that the members 41 and parts secured thereto will be rigidly held upon either sleeve 22 or sleeve 31.

The protruding knives 49, as shown'in de- 5tail inFigs. 6, 7, and 8, and the circular dieseat knives 50, as shown in Figs. to 12, inclusive, are each provided with holes 52 and 53, and 54 and 55, respectively, corresponding in distance apart and size to the holes 47 2 and 48 in the rings 41 and 44, by means of which said knives are fixedly secured between rings 41'and 44, knife 49 being a segment of a ringwith an inner peripheral surface. 56 formed on an are having thesame radius as that of the exterior periphery of the, flange 42 while knife 50 is ring-shaped with an inner periphery of the same size as the outer periphery of flange 42. .The knife 50 is of'the same exterior diameter as ring 44 and is formed with a centrally. disposed peripheral groove 57 and is cut across, as shown at- 58. It is additionally secured to ring 41 by. bolts 59 extending through knife 50 and disk 41 and havingthe heads thereof received in depressions 60 in the inner face of. disk 44, as shown in Figs. '11 and 12, knife 50 thus being secured to ring 41 with cutaway portions 58 .and 43 juxtaposed but being secured to disk 44 only by long bolts 61 passing through holes 47 and 48 in disks 41 'and 44 and holes 54"and 55 in the knife itself. By these means the' cutting elements are rigidly and firmly secured to the rotating sleeves 22 and 31 yet are free to be adjusted to' any extent desired along said sleeves. In positioning the cutting elements 'the cross slots 43 of the disks. 41 will always bepositioned' over the, line 40 on sleeves 31 and 22 and this line may, if desired, be provided' with a scale by means of which the distance apart of the different pairs of ring disks 41 and 44 may be regulated to cut slits separated from one another any desired distance. Adjustment of the members on sleeve d sleeve 22 ill, of course, be such that the rings41 and 44 on sleeve. 22 will come.

directlv over rings 41 and 44 on sleeve'31, protruding knives 49 between the upper pairs ofrings of course operating to enter Q slots 57 inthe circular die knives 50, as

shown'in Fig. 3. If it is desired to dispense with the operation of any of the coeperating pairs of slotting members one or the other of such members may be moved on its sleeve -31 or 22 to bringit out of engagement with 14. Upon this table are adjustably secured the other member in which position it will be inoperative during operation of the machine,

To strip the blanks from the upper set of rollers after knives 49 have been thrust therethrough to form the slots, a series of incurved fingers 62 are adjustably mounted upon a cross-bar 63 removably secured tocastings'16 and 17 by means of thumbscrew 64 entering a slot 65 in the'bottom of said bars. The members 62 may be bent tinesof steel or other metal and are secured to bifurcated carriers-66 by mfians of a set screw 67, said carriers riding upon bar 63 and being-secured thereto in any desired posi-'' tion of adjustment by set screw 68. Two or more of the stripping fingers 62 may be used, as desired, and will, of course, be positioned, to extend between pairs of upper rollers, as shown. v

To strip the kerf of cardboard removed by the knives 61' and thereby forced within groove 57 tongue-like members 69 are ad justably secured upon a rod 70 rigidly secured in and extending betweencastings 16 and 17. Said members are formed of thin strips of metal of a thickness adapting the same to enter the slots 57 of the die-knives and are provided with a curved or beveled end 71 the point of which engages the bottom of said slotso that as the kerf is brought along by the roller the end thereof will .ride up on the member 69 and be thereby stripped from slots 57. Members 69 are formed with sleeves 72 which are secured to rod .70 by set screws 73. A receiving board 74 is secured upon a sleeve 75 mounted on a rod 76 carri-ed by, eyebolts 77 secured to frame members 14. The board 74 may be rotated into the position shown in dotted lines in Fig. 0%

where it will be entirely out of the way.

The stripping member 69 may als'o'be rotated on stationary rod 70 by loosening set screws 73, and they may, of course, be ad'- justed along said rod to correspond with 111 adjustments made on sleeve 31 of the slotting members.

A feed table 78 is supported by standards 7 9 extending upwardly from frame members.

11 end guides 80 and 81- anda side guide or compressor 82 for holding the blanks in position to be fed through. the machine, the adjustment of these members being providedfor by extending the shanks 83, 84- and 85 carrying the same,.through.guide brackets '86, 87 88 on the table 7 8; in which are ,s'et

screws 89, 90 and 91, respectively, forhblding the parts where'set. A cross-bar, 92 is; secured to the front side'of castings 16 and 17 and is provided with transverse Ways 93 and 94 in which slides a gate 95, saidgate being held in any desired. position of. adjustment by means of a thumb screw 96*rota' tahly. -mounted in arearwardly extendi g 15 lug 97 on the back of gate 95 and threaded into a lug 98 on the cross-bar 92. To the rear side of gate 96 is secured a brush 99 for resiliently holding the blanks firmly in contact with the table as the same are fed forward into the machine. By raising or lowering the gate 95 blanks of different thicknesses may be fed through the machine. Also, it is practicable with this machine to feed two or more blanks at each stroke of the pusher.

The pusher comprises a member 100 adapted to slide in a way 101 formed in the top of table 78, said member having a square front edge 102 extending the desired amount above the surface of table 7 8 to engage one or more blanks according to the thickness thereof. Member 100*is rigidly secured to a slide 103 having secured to the under side thereof a plate 104 extending beyond the sides of the aforesaid way, as best shown in Fig. 5. A pivot bolt 105 is mounted centrally in member. 103 extending through plate 104, to the lower end of which is pivot-ally connected at 106 a link 107 which is pivotally connected to the long arm of a lever 111 mounted on a rock shaft 108 adjustably mounted in bearings 109, 110 in the table 78 and frame member 14, respectively. The' short.arm of the lever 111 is connected by universal joint 112 with a link 113 pivotally connected at 114 with a rod 115 on an eccentric 116 mounted on shaft 18.

In operation, after the adjustments of the slotting elements on sleeves 22 and 31 have been made for cutting slots of the proper depth and spaced apart the proper extent the machine is clutched to the source of power by means of lever 30. At each movelution of shaft 18 pusher 100 will be operated to force one or more of the blanksbetween the sets of slotting devices on sleeves 22 and 31. The outer peripheral surfaces of rings or rollers 41 and 44 will. seize the blanks and at the same time the protruding knives 61 cooperating with the outer edges of the grooves 57 will begin to cut out a strip of material from thecardboard blank. The cutting is effected by a clean and continuously progressing shearing action and removes the kerf of cardboard leaving an absolutely clean edge at either side of the slot formed thereby. The length of the slot will be determined by the position of the sleeve 22 relative to the shaft 18 and more particularly the eccentric .116 thereon, which posit-ion is readily adjusted through the rotation of gear on shaft 19 by the means already described. The termination of the slot is made as clearly as its beginning and always occurs when the rear end 117 of protruding knife 49 reaches cutting position in groove 57, as indicated in Fig. 3. The slotted blanks are then strippe from the series of cutters on sleeve 22 by the fingers (32, while the kerfs removed from the blanks are stripped from the slots 57 by fingers (39, the blank being thrown out on board""7 l from which it will slide to any convenient receptacle or receiving means.

For certain classes of work it is son'ietimcs desirable to arrange a seriesof the rotary slotting devices successively in a single ma-- chine. This may happen when it is prt posed to cut a series of slots more closely positioned with respect to one another than is possible where all the slottingdevices are ona single set of shafts. By arranging the sets of slotting devices on the successive sets of'shafts in staggered or off-setting relation itis possible to cut a series of slots as close together as may be desired, even to the extent of forming a fringe-like border upon the material being slotted. Such a use of our machine is contemplated by us and falls within the scope of our invention.

\Ve claim:

1. A machine for slotting blanks comprising sets of feeding rollers cooperating in superposed pairs, and sets of rotary shearing devices centrally mounted in said feed rollers and cotiperating in pairs to cut the slots.

2. A machine for slotting blanks comprising sets of feeding rollers coiiperating in superposed pairs, sets of rotary shearing devices centrally mounted in said feeding roll ers and coiiperating in pairs to cut the slots, and reciprocating means to feed said blanks singly and successively to said feeding rollers.

3. A machine for slotting blanks, comprising a drive shaft. a reciprocating feeder operatively connected thereto, a set of slotting devices on said shaft, a second shaft having thereon a second set of slotting devices cooperating with. said first set, spur gears forming operative connection between said shafts. the gear on the second shaft be ing connected to the slotting means on said second shaft by a bolt and slot connection permitting relative adjustment thereof.

t. A machine for slotting blanks, comprising a drive shaft. a reciprocating feeder operativ-ely connected thereto, a set of slotting devices on said shaft, a second shaft having thereon a second set of slotting devices ci'itiperating with said first set, spur gears forming operative connection between said shafts, the gear on the second shaft being adjustable relatively to the slotting means on said second shaft, and being provided with a pointer and a scale rigid with said second slotting means cooperating with said pointer to indicate the length of slot for cutting which said slotting devices are set. w

5. A machine for slotting blanks comprising two rotary members, and sets of retary a; raring devices mounted on said memdevices-after the slots have been cut.

bersand cooperating in pairs to cut the slots, each pair of said shearing devices comprising an integral double-shear-edged grooved ring removably mounted on one rotary member and a double-shear edged knife on the other rotary member.

6. -A machine for slotting blanks comprising two rotary members, sets of rotary'shear ing devicesmounted' onsaid members and cooperating inpairs to cut the slots, means to feed the blanks to said shearing devices,- means for removing. the blanks therefrom, and-ineans for vremoving the kerf cutfrom the 'slots in the board from' saidw shearing 7. A machine for slotting blanks, comprising rotary members,'shear holders adjust--.

ably secured to each of said members con sisting of means'to' engagesaid rotary memher at a number of points, and means for causing said engaging means to clamp said holders rigidly to the rotary member or for releasing the same to permit adjustment at will. a I

'8. A machine for slotting blanks, comprising'rotarymembers, shear holders adjust-' -ably secured to each of said members consistingof a split ring havinga flanged base encircling said ,rotary member,.a closed'ringencircling sald base, and set-screws in said closed ring bearing on said flanged portion,

of said splitring adjacent the split therein. '9. A machine for slotting blanks, comprising rotary members, shear holders adjustably secured to each of said members consisting ofa split ring having a flanged base encirclingsaid rotary member, a closed ring encircling said base, set-screws in said closed ri-ng bearing on. said flanged portion of'said split ring adjacent the split therein, and a slot-cutting shear element secured between said rings,

10: A machine. for slotting blanks, comprisingrotary members, shear holders adjustablysecured to each of said members consisting-of a split ring havlng a flanged base encircling said rotary member, a closed ring encircling said base, set-screws 111 said closed ring bearing on" said flanged portion of said split ring adjacent the split therein, and a slot-cutting shear element secured between said rings by means of bolts passing through both of said rings and said slotting element at points nearly opposite said split in thejsplitring.

11. A machine for slotting blanks, comprising rot-ary members, shear holders adjustably secured to each of said members consisting of a split ring having a flanged base encircling said rotary member, a closed ring encircling sa d base, set-screws n said closed ring bearing on said. flanged portion of said split ring adj went the split therein, a slot-cutting shear element secured between said rings by means of bolts passing through both of said rings and said slotting element at points nearly opposite said splitin the split ring, andv other bolts securing said slotting element 'to said split ring only at different points in the circumference thereof.

12. A machine for slotting blanks comprising two rotary members, sets of rotary shearing devices mounted on said members and cooperating in pairs to cut the slots, each pair of said shearing devices comprising a double-shear-e'dged grooved ring on one rotary member and a doubl'e-shear-edged knife on the other rotary member, and sta and tongue-like members adjustably mounted on said shaft and having pointed ends adapted to be positioned so that said points will bear against the bottoms oflsaid grooves and remove the kerfs cut from the blank in slotting the same.

In testimony whereof we afiix our signa tures in presenceof two witnesses. GEORGE A. FISHER. JOHN A. MORRISON. \Vitnesses i JENNIE B. MARXEN, I OLIVER P. Dnrron. 

